New breeding technologies in plant sciences

Transcription

1 New breeding technologies in plant sciences GPC-SEB workshop, 7-8 July 2017, Gothenburg, Sweden Historical Evolution of Biosafety Legislation and Key Definitions. Piet van der Meer : responsible for biosafety regulation in the Netherlands 2000 today: assisting governments and international organisations 2006 today: Faculties of Law and Sciences, Ghent Brussels, Belgium

2 Genetic Modification Traditional plant breeding x elite variety Related variety Genetic Modification any gene source

3 Genetic Modification Technical advantages, e.g.: More specific and faster Maintaining cultivar characteristics (breeding brings in difficult to remove unwanted genes) Possible with plants and animals that do not cross sexually Tweaking expression (e.g. stress induced, tissue specific) Much greater reservoir of genes; in principle any gene from any organism can be introduced in another organism.

4 Biosafety Historical highlights 1972: First publications on rdna 1974: Berg Letter published in Science, anticipated benefits and potential risks, calling for a voluntary moratorium. 1975: Asilomar : technique not inherently risky, but potential for novel combinations, safety case by case, end of moratorium. 1976: US-NIH Guidelines for rdna micro-organisms in laboratories 1978: Other countries follow, e.g. UK (1978), Netherlands (1979) 1986: OECD Blue Book, rdna safety recommendations; key concepts for risk assessment and risk management

5 Biosafety Regulations 1986: US coordinated framework for regulation of biotechnology 1990: EU Directives on Contained Use and Release of GMOs 1992: Agenda 21, maximise benefits, minimize risks >>> Convention on Biological Diversity 1996: Canada (CFIA, Health Canada) 2000: Cartagena Protocol on Biosafety - transboundary movement ~ 2000 onwards: Review and revision of regulatory systems (e.g. EU) ~ 2010 onwards: Are organisms developed through NBTs covered by the regulations? Depends on the definitions

6 Definitions - History 1986: OECD Blue Book : Definitions of genetic manipulation and recombinant DNA varies in detail between countries, but rdna organisms are described as constructed by introducing DNA from a donor organism into a recipient E.g.: UK: formation of new combinations of heritable material by the insertion of nucleic acid molecules, produced outside the cell, via vector system so as to allow their incorporation into a host organism in which they do not naturally occur but in which they are capable of continued propagation.

7 Definitions Historical highlights Debate as of the mid 80s: which organisms should be subject to prior risk assessment? Observations put forward: Conventional breeding and rdna can both result in novel genetic combinations that can cause adverse effects rdna techniques themselves do not confer risky characteristics rdna can make a broader range of novel combinations Options discussed: Include all conventionally produced organisms? Focus on risky organisms? Focus on novel organisms?

8 Which organisms subject to prior risk assessment? Considerations: Include all conventionally produced organisms: is there an unmet need to include them? Focus on Risky organisms: how to define which are risky? Focus on Novel organisms: how to define novel? Genotypic and/or phenotypic? Does not exist or is unlikely to happen? >> Different approaches in different systems, most focus on novelty

9 US Coordinated Regulatory Framework for Biotechnology Department of Agriculture (USDA-APHIS-BRS) Plant Protection Act (PPA) Environmental Protection Agency (EPA) Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) FFDCA: Setting allowable levels of pesticides in food Toxic Substances Control Act (TSCA) Food and Drug Administration (FDA) Federal Food, Drug and Cosmetic Act (FFDCA)

10 Definitions: USA - USDA USDA Plant Protection Act, Protecting against damage from plant pests and noxious weeds Regulatory trigger: the use of genetic engineering in combination with the use of plant pest as recipient, donor or vector, in the transformation process.

11 Definitions: USA FDA FDA: Authority based on Federal Food, Drug and Cosmetic Act (FFDCA) Guidance in the Federal Register of 1992: The 1992 policy applies to foods developed from new plant varieties, including varieties that are developed using recombinant deoxyribonucleic acid (rdna) technology (which is often referred to as "genetic engineering" or "biotechnology"). This guidance document refers to foods derived from plant varieties that are developed using rdna technology as "bioengineered foods."

12 Definitions: USA EPA EPA: authority based on FIFRA, FFDCA, TSCA: Plant-Incorporated Protectant (PIP, 2001) - a pesticidal substance that is intended to be produced and used in a living plant, or in the produce thereof, and the genetic material necessary for the production of such a pesticidal substance. " PIPs developed through conventional breeding will remain exempt from all FIFRA and FFDCA requirements, with the exception of adverse effects reporting requirements for manufacturers.

13 Definitions: EU (1990/2001) GMO means an organism in which the genetic material has been altered in a way that does not occur naturally; Annex: Genetic modification occurs at least through the use of: rdna techniques involving the formation of new combinations of genetic material by the insertion of nucleic acid molecules produced by whatever means outside an organism, into any virus, bacterial plasmid or other vector system and their incorporation into a host organism in which they do not naturally occur but in which they are capable of continued propagation; Direct introduction, e.g. macro injection fusion techniques where live cells with new combinations of heritable genetic material are formed through the fusion of two or more cells by means of methods that do not occur naturally.

14 Definitions Canada (1996) CFIA (1996, based on the Seeds Act and Feed Act) and Health Canada (Food and Drug Act) Plants with novel traits fall under the regulatory trigger of the seeds regulations if: They have a novel trait that was not present prior to December 1996 in germplasm of the same species in Canada, and that plant poses an environmental risk.

15 Definitions CPB Cartagena Protocol on Biosafety: (2000) "Living modified organism" means any living organism that possesses a novel combination of genetic material obtained through the use of modern biotechnology; Modern biotechnology" means the application of: - In vitro nucleic acid techniques, including recombinant deoxyribonucleic acid (DNA) and direct injection of nucleic acid into cells or organelles, or - Fusion of cells beyond the taxonomic family, that overcome natural physiological reproductive or recombination barriers and that are not techniques used in traditional breeding and selection;

16 Definitions - EU Question whether and to what extent organisms developed through NBTs such as genome editing fall under the definition of GMO. Discussion: Altered in a way that does not occur naturally? Refers to: Process/technique? The product/resulting organisms? Both?

17 Definitions - EU Legal clues: The law itself, explanatory notes, Jurisprudence, doctrine The final word is with the European Court of Justice (ECJ). Interpretation by the ECJ: the wording, general scheme and spirit Literal interpretation, text of the definition and the annexes When the wording in itself is not conclusive: Systemic interpretation (general scheme), internal and external consistency (e.g. CPB) Dynamic interpretation, e.g. teleological or functional, see ERA, pushing an interpretation to its limits [See also Callebaut 2015]

18 Definitions EU (2001) GMO means an organism in which the genetic material has been altered in a way that does not occur naturally; Annex: Genetic modification occurs at least through the use of: rdna techniques involving the formation of new combinations of genetic material by the insertion of nucleic acid molecules produced by whatever means outside an organism, into any virus, bacterial plasmid or other vector system and their incorporation into a host organism in which they do not naturally occur but in which they are capable of continued propagation; Direct introduction, e.g. macro injection fusion techniques where live cells with new combinations of heritable genetic material are formed through the fusion of two or more cells by means of methods that do not occur naturally.

19 Definitions - EU My conclusion: For an organisms to fall under the EU definition of GMO requires a) the use of certain techniques ( trigger ) and b) a certain level of novelty of the resulting combinations of genetic material. E.g. small point mutations obtained through genome editing would not result in a GMO.

20 Definitions - EU Views of others and other views: European Commission: formulating views by taking into account reports of a WGNBT (2012), EFSA, JRC and Legal Services Confirmed in reply to MEPs, both process and product relevant D and SE authorities have formally concluded that certain organisms developed through ODM and CRISPR are not GMOs D, UK, IRL and ES confirmed in a letter to the EC that the EU GMO definition relies on the technique and the resulting organism. Some NGOs adhere to a process based interpretation arguing that these technologies are considered likely to bring negative impacts on human and/or environmental health.

21 Distinguish various categories: Future Regulation Mixing genes between sexually compatible organisms: cross breeding, hybrids, marker assisted selection, embryorescue, polyploidy, cis-genesis, Generating genetic variation within existing genomes: mutation breeding, genome editing. Generating novel genetic combinations: e.g. Introducing traits from an unrelated organism into another: genetic modification/genetic engineering.

22 TACK!